DE410824C - Process for the preparation of pulp from wood and lignified materials - Google Patents
Process for the preparation of pulp from wood and lignified materialsInfo
- Publication number
- DE410824C DE410824C DEW63319D DEW0063319D DE410824C DE 410824 C DE410824 C DE 410824C DE W63319 D DEW63319 D DE W63319D DE W0063319 D DEW0063319 D DE W0063319D DE 410824 C DE410824 C DE 410824C
- Authority
- DE
- Germany
- Prior art keywords
- wood
- pulp
- preparation
- digestion
- lignified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/222—Use of compounds accelerating the pulping processes
Description
Verfahren zur Darstellung von Zellstoff aus Holz und verholzten Stoffen. Bei der Herstellung von Zellstoff aus Holz oder verholzten Stoffen läßt sich der Aufschluß des Holzes nur schwer so regeln,, daß vorzugsweise die inkrustierenden Substanzen aufgelöst werden, ohne daß der Zellstoff selber angegriffen wird. Die starke Einwirkung der Aufschlußmittel verringert sow ohl die Ausbeute an Zellstoff, als auch. dadurch eine Schwächung des Materials bewirkt wird, wodurch der Zellstoff weniger widerstandsfähig und kurzfaserig wird.Process for the preparation of pulp from wood and lignified materials. When producing pulp from wood or lignified materials, the It is difficult to regulate the digestion of the wood in such a way, that preferably the encrusting Substances are dissolved without the pulp itself being attacked. the strong action of the disintegrating agent reduces the yield of pulp, as well as. this causes a weakening of the material, whereby the pulp becomes less resistant and has short fibers.
Durch das neue Verfahren sollen diese L`belstände dadurch möglichst behoben werden, daß der Aufschluß des Zellstoffes, in Gegenwart von Aluminiumverbindungen stattfindet. Statt der Aluminiumverbindungen können auch Zinkverbindungen oder Gemische beider verwandt werden.The new process is intended to ensure that these dregs are as much as possible be remedied that the digestion of the pulp, in the presence of aluminum compounds takes place. Instead of the aluminum compounds, zinc compounds or mixtures can also be used both can be used.
Das Verfahren kann z. B. so ausgeführt werden, daß das aufzuschließende Holz zunächst mit einer Aluminiumsalzlösung behandelt wird und dann dem üblichen Aufschluß unterworfen, oder es kann auch z. B. das "erfahren so ausgeführt werden, daß die zum Aufschluß des Holzes gewöhnlich verwandte Lösung unmittelbar mit Aluminitum'-salzen oder Aluminiumoxydhydrat versetzt wird.The method can e.g. B. be carried out so that the to be unlocked Wood is first treated with an aluminum salt solution and then the usual Subjected to digestion, or it can also, for. B. the "experienced can be carried out that the solution usually used to digest the wood is directly salted with aluminum or aluminum oxide hydrate is added.
Es wird z. B. das Holz vor dem Alkali: aufschluß mit einer I, ,prozentigen Aluminium-oder Zinksalzlösung während kurzer Zeit gekocht, was bei gewöhnlichem Atmosphären: druck geschehen kann. Die Lösungen werden dann abgegossen, und der weitere Aufschluß des Holzes erfolgt wie gewöhnlich.It is z. B. the wood before the alkali: digestion with an I,, percent Aluminum or zinc salt solution boiled for a short time, what with ordinary Atmospheres: pressure can happen. The solutions are then poured off, and the further digestion of the wood takes place as usual.
Es kann aber auch das aufzuschließende Holz z. B. mit der vierfachen Menge einer 15prozentigen Natronlauge versetzt werden, die etwa o,2 Prozent Tonerde oder Zinkoxyd gelöst enthält. Auch hier geschieht der Holzaufschluß dann weiter wie gewöhnlich.But it can also be the wood to be opened z. B. with the fourfold Amount of a 15 percent sodium hydroxide solution are added, which is about 0.2 percent clay or contains dissolved zinc oxide. Here, too, the wood digestion continues as usual.
Bei dem neuen Arbeitsverfahren beruht die Wirkungsweise anscheinend darin, daß die im Holze befindlichen Säuren, vorzugsweise Harzsäuren, unlösliche Aluminiumsalze bilden, die in feinster Verteilung auf dem Holze sich niederschlagen und dasselbe so vor einem zu starken Angriff der Aufschluß,-reagenzien schützen.The mode of action is apparently based on the new working method in that the acids in the wood, preferably resin acids, are insoluble Form aluminum salts that are finely distributed on the wood and so protect it from too strong an attack by the digestion reagents.
Der Holzaufschluß zur Zellstoffherstellung geschieht in einem Konverter, in dem sich etwa io cbm Holz befinden, das mit etwa i 2 cbm i 2prozentiger Natronlauge unter Zusatz von etwa 6o kg 3oprozentiger Natriumaluminatlauge versetzt wird.The wood digestion for pulp production takes place in a converter, in which there is about 10 cbm of wood with about i 2 cbm of i 2 percent sodium hydroxide solution with the addition of about 60 kg of 3% sodium aluminate liquor.
Im übrigen wird der Holzaufschluß, wie üblich, weiter durchgeführt.Otherwise, the wood digestion is carried out further as usual.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW63319D DE410824C (en) | 1923-03-07 | 1923-03-07 | Process for the preparation of pulp from wood and lignified materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW63319D DE410824C (en) | 1923-03-07 | 1923-03-07 | Process for the preparation of pulp from wood and lignified materials |
Publications (1)
Publication Number | Publication Date |
---|---|
DE410824C true DE410824C (en) | 1925-03-10 |
Family
ID=7606843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEW63319D Expired DE410824C (en) | 1923-03-07 | 1923-03-07 | Process for the preparation of pulp from wood and lignified materials |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE410824C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0012775A1 (en) * | 1978-12-20 | 1980-07-09 | Eric S. Prior | Process for pulping ligno-cellulosic material |
EP0022881A1 (en) * | 1979-07-19 | 1981-01-28 | Eric S. Prior | Accelerated pulping process |
WO1984004937A1 (en) * | 1983-06-06 | 1984-12-20 | Eric S Prior | A process for the chemical pulping of lignocellulosic material |
-
1923
- 1923-03-07 DE DEW63319D patent/DE410824C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0012775A1 (en) * | 1978-12-20 | 1980-07-09 | Eric S. Prior | Process for pulping ligno-cellulosic material |
EP0022881A1 (en) * | 1979-07-19 | 1981-01-28 | Eric S. Prior | Accelerated pulping process |
WO1981000267A1 (en) * | 1979-07-19 | 1981-02-05 | E Prior | Accelerated pulping process |
WO1984004937A1 (en) * | 1983-06-06 | 1984-12-20 | Eric S Prior | A process for the chemical pulping of lignocellulosic material |
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